from collections import OrderedDict

from django.shortcuts import render
from django.views import View
# Create your views here.
from contents.models import ContentCategory
from goods.models import GoodsChannel


class HomeView(View):


    def get(self, request):

        # 1.获取数据
        # 使用有序字典保存类别的顺序
        # categories = {
        #     1: { # 组1
        #         'channels': [{'id':, 'name':, 'url':},{}, {}...],
        #         'sub_cats': [{'id':, 'name':, 'sub_cats':[{},{}]}, {}, {}, ..]
        #     },
        #     2: { # 组2
        #
        #     }
        # }
        # 初始化存储容器
        categories = OrderedDict()
        # 获取一级分类
        channels = GoodsChannel.objects.order_by('group_id', 'sequence')

        # 对一级分类进行遍历
        for channel in channels:
            # 获取group_id
            group_id = channel.group_id
            # 判断group_id 是否在存储容器,如果不在就初始化
            if group_id not in categories:
                categories[group_id] = {
                    'channels': [],
                    'sub_cats': []
                }

            one = channel.category
            # 为channels填充数据
            categories[group_id]['channels'].append({
                'id': one.id,
                'name': one.name,
                'url': channel.url
            })
            # 为sub_cats填充数据
            for two in one.goodscategory_set.all():
                # 初始化 容器
                two.sub_cats = []
                # 遍历获取
                for three in two.goodscategory_set.all():
                    two.sub_cats.append(three)

                # 组织数据
                categories[group_id]['sub_cats'].append(two)

        # 广告和首页数据
        contents = {}
        content_categories = ContentCategory.objects.all()
        # content_categories = [{'name':xx , 'key': 'index_new'}, {}, {}]

        # {
        #    'index_new': [] ,
        #    'index_lbt': []
        # }
        for cat in content_categories:
            contents[cat.key] = cat.content_set.filter(status=True).order_by('sequence')

        # 2. 渲染
        context = {
            'categories': categories,
            'contents': contents
        }


        return render(request,'index.html',context)





###################################################################热销排行######################################################

from rest_framework.views import APIView
from rest_framework.generics import ListAPIView
from .models import SKU
from .serializers import SKUSerializer
from rest_framework.response import Response

# class HotSKUListAPIView(APIView):
#
#     def get(self,request,category_id):
#         print(request)
#         print(category_id)
#         #category_id是传递过来的１１５，但同时self 里面也有dict{'category_id',115}
#         hotsku=SKU.objects.filter(category=category_id).order_by('-sales')[:2]
#
#         seializer=SKUSerializer(instance=hotsku,many=True)
#
#
#         return Response(seializer.data)




class HotSKUListAPIView(ListAPIView):

    pagination_class = None

    # queryset =SKU.objects.filter(category=115).order_by('-sales') [:2]

    serializer_class = SKUSerializer

    def get_queryset(self):

        category_id=self.kwargs.get('category_id')

        return SKU.objects.filter(category=category_id).order_by('-sales')[0:2]



##########################################################同种商品根据各自的属性排序分页###############################################################


class SKUListAPIView(ListAPIView):


    serializer_class = SKUSerializer

    def get_queryset(self):

        category_id=self.kwargs.get('category_id')

        return SKU.objects.filter(category=category_id)


     #排序
    from rest_framework.filters import OrderingFilter
    filter_backends = [OrderingFilter]

    ordering_fields=['create_time','price','sales']



    # 分页
    # from rest_framework.pagination import LimitOffsetPagination
    #
    # pagination_class = LimitOffsetPagination




##############################################搜索视图集#####################################################


from .serializers import SKUIndexSerializer

from drf_haystack.viewsets import HaystackViewSet

class SKUSearchViewSet(HaystackViewSet):
    """
    SKU搜索
    """
    index_models = [SKU]

    serializer_class = SKUIndexSerializer





